Supratherapeutic lithium levels in COVID-19 infection.

Lithium levels are often checked in the inpatient setting when a patient has clear indications of acute kidney injury. Lithium levels can become supratherapeutic in COVID-19 infection even after normalization of creatinine. Lithium levels should be checked routinely in patients with COVID-19 infection in order to avoid supratherapeutic levels.